trying to get the value of a textbox.text before a post back

ASP.NET 2.0. VB.Net 

I am trying to get the value of this textbox before postback

<asp:TextBox ID="Notes" runat="server" 
TextMode="MultiLine" Rows="6" Columns="90"></asp:TextBox>
Once I get the value I would like to update a DataSet before postback
 'Update Email Message
        Dim UpdateEmail3MessageAdapter As New Email_Temp3TableAdapters.Email_Temp3TableAdapter
        Dim UpdateEmail3Message As Email_Temp3.Email_Temp3DataTable = UpdateEmail3MessageAdapter.GetDataEmail_Temp3
        For Each UpdateEmail3MessageRow As Email_Temp3.Email_Temp3Row In UpdateEmail3Message
            If UpdateEmail3MessageRow.UserName.ToUpper = Advsecu.GetCurrentUserID().ToUpper Then
                UpdateEmail3MessageRow.EmailMessage = Notes.Text
                Exit For ' Exit For Loop
            End If
        Next
        UpdateEmail3MessageAdapter.Update(UpdateEmail3Message)
 
The above UPDATE does not work b\c there is no value for Notes.Text.  And that is my problem.  
 
Thanks, MichaelOSS
1
MichaelOSS
3/3/2008 7:23:32 PM
asp.net.state-management 8807 articles. 0 followers. Follow

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You could use the TextBox's clientside OnChange event to execute a javascript xmlhttprequest, which can cause some server side code to be executed to do this.  You would have to pass in the clientside value of Notes, because it will not be available to the server until the page is posted back.

http://www.mikesdotnetting.com/Article.aspx?ArticleID=40 

 


Regards Mike
[MVP - ASP/ASP.NET]
My site
-1
Mikesdotnetting
3/4/2008 7:35:17 AM

What is the event you write that code in ?

-1
idof
3/4/2008 1:45:42 PM

It will be called by the clientside onclick event.  You can set this up from ASP.NET by using the OnClientClick attribute, or Attributes.Add()

 


Regards Mike
[MVP - ASP/ASP.NET]
My site
1
Mikesdotnetting
3/4/2008 8:31:31 PM

Used auto postback for validation, the "OnTextChanged" event and I set "AutoPostBack=true" for the textbox.

 

<InsertItemTemplate>
<asp:TextBox id="x_ResourceURL" TextMode="MultiLine" Rows="2" Columns="70" AutoPostBack="True" OnTextChanged="GetURL" CssClass="aspnetmaker" runat="server" />
<asp:HyperLink ID="Resource_Link_Test" CssClass="aspnetmaker" runat="server" Text="Test Resource Link" ImageUrl="images/Web_Server_16.png" Target="_blank" />
<asp:Label ID="Resource_Link_Label" runat="server">Test Resource Link</asp:Label>
<asp:RequiredFieldValidator ID="vx_RESOURCEURL" CssClass="aspnetmaker" runat="server" ControlToValidate="x_RESOURCEURL" ErrorMessage="Please enter required field - Resource Link" ForeColor="Red" Display="None" Text="*" />
</InsertItemTemplate>
 
1
MichaelOSS
5/9/2008 10:27:21 PM
Reply:

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